There were six complaints about strollers in priority seating in the six months after the campaign launched compared with 15 complaints in the six months prior to the campaign, the CTA said.

In 2012, bus drivers began passing out fliers to riders with strollers to remind them that open strollers are allowed to be parked in priority seating but must move if a rider with a disability or a senior citizen needs the seat. Use of smaller strollers is encouraged.

Rider complaints about priority seating in general were down 21 percent, from 43 complaints in the six months prior to the compaign to 34 complaints in the six months after it.

"We are monitoring [priority seating] closely," Claypool said at the monthly CTA board meeting after a rider complained about regularly encountering strollers in priority seating. "We believe we are making progress."

Claypool said today the agency reissued the priority seating bulletin to remind bus drivers of the rules. Federal law requires the CTA to designate some seats for the elderly and riders with disabilities.

Some CTA announcements also ask riders to give up their seats for expectant mothers.

Claypool said the agency will gather more data on the efficacy of the campaign before deciding whether it will adopt the policy the suburban Pace bus system employs, which asks riders to fold strollers before boarding the bus.

Two suburban men assaulted and robbed a panhandler on the South Side on Monday—then came back and beat him again after one of the men left his cellphone at the scene, prosecutors said at a court hearing Tuesday.

A day after Trevor Noah was declared the new host of "The Daily Show," his graphic tweets targeting women and Jews are causing a social media backlash and Comedy Central is defending its newest late-night star.